How to draw an Islamic geometric pattern: Ayyubid Star.

Draw an Islamic geometric pattern in less than five minutes using a tradtional method and traditional tools: a ruler and pencils. How to draw this patterns is also shown in my book ’Islamic Geometric Design’ (2013) and in my eBook ’Draw Islamic Geometric Star Patterns’ (=sr_1_5?ie=UTF8&qid=1412614713&sr=8-5&keywords=broug)